Before going to bed try--

Shut it off.
Unplug it.
Hold power button to discharge capacitors.
Plug it back in & press power button to start it.
Let it run all night.
If it is not running after after you wake up 8 hours later something is very wrong.

Then maybe use another computer to download an iso & reinstall your os.
Or use factory recovery disks if you have them.
Others may offer better advice.